Libxml2 is the XML C library developed for the
Gnome project. The library code is portable (to
Linux, Unix, Windows, embedded systems, etc.) and
modular; most of the extensions can be compiled
out. Libxml2 implements a number of existing
standards related to markup languages, including
the XML standard, Namespaces in XML, XML Base,
Relax NG, RFC 2396, XPath, XPointer, HTML4,
XInclude, SGML Catalogs, and XML Catalogs. In most
cases, libxml tries to implement the
specifications in a relatively strict way. To some
extent, it provides support for the following
specifications, but doesn't claim to implement
them: DOM, FTP client, HTTP client, and SAX2.
Support for W3C XML Schemas is in progress. It
includes xmllint, a command line XML validator.

Dia is a program for creating diagrams of all
kinds. The current version can do UML class
diagrams, Entity-Relationship modeling, network
diagrams, and much more. The engine is very
flexible and dynamically loads diagram-types from
disk. It stores diagrams in an XML format, but can
read and write a number of different formats.

GNOME Commander is a fast and powerful graphical file manager. It has a "two-pane" interface in the tradition of Norton and Midnight Commander. It features drag'n'drop, GNOME MIME types, FTP, SFTP, and WebDAV using the GnomeVFS FTP module, SAMBA access, the ability to extend the context menu with entries to call external applications or scripts on the selected items, quick device access buttons with automatic mounting and unmounting, a fast file viewer for text and images, a history of recently accessed
folders, and folder bookmarks.

Pybliographer is a tool for managing bibliographic databases. It supports several bibliography formats (BibTeX, Refer, Medline, ISI, Ovid) and can be used for searching, editing, reformatting, etc, through its nice graphical interface for GNOME. Due to its nature, it can be extended to many uses (generating HTML pages according to bibliographic searches, etc). It is provided with sample scripts.

PAC provides a GUI to configure SSH and Telnet connections, including usernames, passwords, EXPECT regular expressions, and macros. It is similar in function to SecureCRT or Putty. It is intended for people who connect to many servers through SSH. It can automate logins and command executions.

Gnumeric is a powerful and easy to use spreadsheet using GNOME. Its goal is to provide a full featured spreadsheet and a smooth migration path for people and organizations currently using proprietary applications. It provides more sheet functions and greatly improved accuracy when compared to Microsoft's Excel. A plugin system lets you extend Gnumeric, adding functions, I/O formats, and real time data capabilities. The existing Python, Guile, and Perl plugins let you define complex functions. Gnumeric is capable of reading and writing MS Excel (XLS and Office Open XML), and reading Lotus, Applix, Quattro Pro, OpenCalc (ODF), XBase, DIF, SYLK, HTML, Psion, MPS, oleo, sc, misc. text formats, and its native XML. It can also generate Latex, HTML, and others.

gjots lets you organize text notes in a convenient, hierarchical way. It can be used for notes, jottings, bits and pieces, recipes, and even PINs and passwords, using encryption. It can also be used to "mind-map" larger compositions like manuals, Web pages, articles, etc. It is a bit like the KDE program "kjots", but uses the GTK library and supports a hierarchy of folders. Files can be output to HTML with an automatic table of contents or to docbook XML. Encryption is supported with ccrypt(1), gpg(1), and openssl(1), so that musings can be kept private.